CN109765680B

CN109765680B - Optical imaging lens

Info

Publication number: CN109765680B
Application number: CN201910262047.8A
Authority: CN
Inventors: 黄林; 周鑫
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2018-05-15
Filing date: 2019-03-25
Publication date: 2021-08-06
Anticipated expiration: 2039-03-25
Also published as: CN109739012A; US20200257091A1; CN108627955A; CN109799599A; CN109765680A; CN109799598A; WO2019218628A1; US11709349B2; CN109739012B; CN109799598B; CN109799599B

Abstract

The application discloses an optical imaging lens, which comprises in order from an object side to an image side along an optical axis: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has focal power; the central thickness CT5 of the fifth lens on the optical axis, the spacing distance T45 of the fourth lens and the fifth lens on the optical axis and the spacing distance T56 of the fifth lens and the sixth lens on the optical axis meet the requirement that the central thickness CT5/(T45+ T56) is more than or equal to 0.19 and less than or equal to 0.26; and the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET5 of the fifth lens meet the requirements that CT4/ET5 are more than or equal to 0.64 and less than or equal to 0.94.

Description

Optical imaging lens

Divisional application statement

The application is a divisional application of a Chinese patent application with the invention name of 'optical imaging lens' and the application number of 201910228583.6, which is filed on 3, 25 and 2019.

Technical Field

The present application relates to an optical imaging lens, and more particularly, to a telephoto lens including six lenses.

Background

With the continuous refinement of semiconductor process technology, the functions of smart phones are more and more comprehensive, and in the aspect of the camera function, people hope that the smart phones can have the imaging function as strong as a camera, for example, the smart phones can shoot scenes farther away, highlight the main body and weaken the background. This requires that the mobile phone is further equipped with an imaging lens having a long focal length, good imaging quality and a small size.

The invention provides a six-lens type telephoto optical imaging lens adopting an aspheric surface, which can realize the purpose of zooming by matching with a wide-angle lens while ensuring the processing characteristics and miniaturization characteristics of the lens, can obtain higher magnification and good imaging effect under the condition of automatic focusing, is suitable for shooting distant objects, and enables customers to obtain different visual effect feelings.

Disclosure of Invention

The present application provides an optical imaging lens applicable to portable electronic products that may solve, at least, or in part, at least one of the above-mentioned disadvantages of the related art.

In one aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Wherein the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a negative optical power; the fourth lens can have focal power, and the image side surface of the fourth lens can be convex; the fifth lens can have negative focal power, and the object side surface of the fifth lens can be a concave surface; and the sixth lens may have a power, and the object side surface thereof may be concave. The effective focal length f3 of the third lens and the effective focal length f of the optical imaging lens can satisfy-3 < f3/f < -1.5.

In one embodiment, the total effective focal length f of the optical imaging lens and the distance TTL on the optical axis from the object side surface of the first lens element to the imaging surface of the optical imaging lens may satisfy TTL/f < 1.

In one embodiment, the effective focal length f3 of the third lens and the effective focal length f1 of the first lens can satisfy-7 < f3/f1 < -4.

In one embodiment, the image side surface of the second lens can be concave; the effective focal length f2 of the second lens and the curvature radius R4 of the image side surface of the second lens can satisfy-2 < f2/R4 < -1.

In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f5 of the fifth lens can satisfy-1.5 < f/f5 < -0.5.

In one embodiment, the object side surface of the first lens can be convex; the effective focal length f1 of the first lens and the curvature radius R1 of the object side surface of the first lens can satisfy 1 < f1/R1 < 2.

In one embodiment, the image side surface of the first lens can be convex; the radius of curvature R2 of the image-side surface of the first lens and the radius of curvature R8 of the image-side surface of the fourth lens can satisfy 0 < R8/R2 < 1.

In one embodiment, the combined focal length f12 of the first and second lenses and the central thickness CT1 of the first lens on the optical axis may satisfy 4 < f12/CT1 < 5.

In one embodiment, a separation distance T56 on the optical axis of the fifth lens and the sixth lens and a separation distance T34 on the optical axis of the third lens and the fourth lens may satisfy 1.5 < T56/T34 < 2.5.

In one embodiment, the image-side surface of the sixth lens element may be convex; the curvature radius R9 of the object side surface of the fifth lens and the curvature radius R12 of the image side surface of the sixth lens can satisfy 0 < R9/R12 < 1.

In one embodiment, the central thickness CT6 of the sixth lens element on the optical axis and the central thickness CT4 of the fourth lens element on the optical axis satisfy 1.5 < CT6/CT4 < 2.5.

In one embodiment, the edge thickness ET5 of the fifth lens at the maximum effective radius and the center thickness CT5 of the fifth lens on the optical axis may satisfy 2 < ET5/CT5 < 3.

In one embodiment, the image side surface of the third lens can be concave; the curvature radius R6 of the image side surface of the third lens and the curvature radius R11 of the object side surface of the sixth lens can satisfy-1.8 < R6/R11 < -0.8.

In one embodiment, the maximum half field angle HFOV of the optical imaging lens may satisfy tan (HFOV) < 0.5.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Wherein the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a negative optical power; the fourth lens can have focal power, and the image side surface of the fourth lens can be convex; the fifth lens can have negative focal power, and the object side surface of the fifth lens can be a concave surface; and the sixth lens may have a power, and the object side surface thereof may be concave. Wherein, the effective focal length f3 of the third lens and the effective focal length f1 of the first lens can satisfy-7 < f3/f1 < -4.

In one embodiment, the effective focal length f3 of the third lens and the effective focal length f of the optical imaging lens can satisfy-3 < f3/f < -1.5.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has optical power. The maximum half field angle HFOV of the optical imaging lens meets the requirement that the HFOV is more than or equal to 23.3 degrees and less than or equal to 24.2 degrees; and the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy 0.93-1.07 of CT2/CT 3.

In one embodiment, the central thickness CT6 of the sixth lens and the central thickness CT1 of the first lens satisfy 0.76 ≦ CT6/CT1 ≦ 0.94.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis, the central thickness CT5 of the fifth lens on the optical axis and the central thickness CT1 of the first lens on the optical axis satisfy 0.6 ≦ (CT4+ CT5)/CT1 ≦ 0.82.

In one embodiment, the central thickness CT6 of the sixth lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.79 ≦ CT6/(CT2+ CT3+ CT4) ≦ 0.94.

In one embodiment, the radius of curvature R1 of the object side surface of the first lens and the total effective focal length f of the optical imaging lens satisfy 0.26 ≦ R1/f ≦ 0.27.

In one embodiment, a radius of curvature R11 of an object-side surface of the sixth lens and a radius of curvature R12 of an image-side surface of the sixth lens satisfy 0.21 ≦ R11/R12 ≦ 0.97.

In one embodiment, the first lens has positive optical power and the image-side surface thereof is convex.

In one embodiment, the second lens has a negative power and the object side surface is convex.

In one embodiment, the third lens has a negative power and the object side surface is convex.

In one embodiment, the fourth lens has a positive optical power and the object side surface is concave.

In one embodiment, the fifth lens has a negative optical power.

In one embodiment, the sum Σ CT of the central thicknesses on the optical axis of the first lens element to the sixth lens element and the distance TTL on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical imaging lens satisfy 0.48 ≦ Σ CT/TTL ≦ 0.53.

In one embodiment, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy 0.36 ≦ (R9-R10)/(R9+ R10) | ≦ 0.9.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has optical power. The curvature radius R9 of the object side surface of the fifth lens and the curvature radius R10 of the image side surface of the fifth lens meet the condition that (R9-R10)/(R9+ R10) | is less than or equal to 0.36 ≦ 0.9.

In one embodiment, the maximum half field angle HFOV of the optical imaging lens satisfies 23.3 DEG.ltoreq.HFOV.ltoreq.24.2 deg.

In one embodiment, the central thickness CT2 of the second lens on the optical axis and the central thickness CT3 of the third lens on the optical axis satisfy 0.93 ≦ CT2/CT3 ≦ 1.07.

In one embodiment, the fifth lens has a negative optical power.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has optical power. Wherein the maximum half field angle HFOV of the optical imaging lens meets the requirement that the HFOV is more than or equal to 23.3 degrees and less than or equal to 24.2 degrees; and the central thickness CT6 of the sixth lens on the optical axis, the central thickness CT2 of the second lens on the optical axis, the central thickness CT3 of the third lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.79-0. 6/(CT2+ CT3+ CT4) -0.94.

In one embodiment, the fifth lens has a negative optical power.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has optical power. Wherein, the central thickness CT6 of the sixth lens element on the optical axis and the central thickness CT1 of the first lens element on the optical axis satisfy 0.76 ≤ CT6/CT1 ≤ 0.94.

In one embodiment, the fifth lens has a negative optical power.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has optical power. Wherein the central thickness CT5 of the fifth lens on the optical axis, the spacing distance T45 of the fourth lens and the fifth lens on the optical axis and the spacing distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.19 ≤ CT5/(T45+ T56) ≦ 0.26; and the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET5 of the fifth lens meet the requirements that CT4/ET5 are more than or equal to 0.64 and less than or equal to 0.94.

In one embodiment, a separation distance T12 between the first lens and the second lens on the optical axis, a separation distance T23 between the second lens and the third lens on the optical axis, and a separation distance T34 between the third lens and the fourth lens on the optical axis satisfy 0.81 ≦ (T12+ T23)/T34 ≦ 1.05.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 0.67 ≦ CT4/T34 ≦ 1.03.

In one embodiment, the fifth lens has a negative optical power.

In one embodiment, the total effective focal length f of the optical imaging lens and the distance TTL between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis satisfy TTL/f < 1.

In one embodiment, the effective focal length f1 of the first lens and the effective focal length f5 of the fifth lens satisfy-0.56 ≦ f1/f5 ≦ -0.26.

In one embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R6 of the image-side surface of the third lens, and the radius of curvature R8 of the image-side surface of the fourth lens satisfy 0.51 ≦ f/(R6-R8) ≦ 0.82.

In one embodiment, the effective focal length f5 of the fifth lens and the curvature radius R11 of the object side surface of the sixth lens satisfy 0.37 ≦ R11/f5 ≦ 1.24.

In one embodiment, the radius of curvature R4 of the image-side surface of the second lens and the radius of curvature R6 of the image-side surface of the third lens satisfy 0.56 ≦ R4/R6 ≦ 0.99.

In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R11 of the object-side surface of the sixth lens satisfy 0.29 ≦ R1/R11 ≦ 0.48.

In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f3 of the third lens satisfy 0.41 ≦ f5/f3 ≦ 0.61.

In one embodiment, the total effective focal length f of the optical imaging lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy-1.7 ≦ f/f2+ f/f3 ≦ -1.35.

In another aspect, the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: the lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has focal power, and the object side surface of the first lens is a convex surface; the second lens has focal power, and the image side surface of the second lens is a concave surface; the third lens has focal power, and the image side surface of the third lens is a concave surface; the fourth lens has focal power, and the image side surface of the fourth lens is a convex surface; the fifth lens has focal power; the sixth lens has optical power. The effective focal length f5 of the fifth lens and the effective focal length f3 of the third lens meet the condition that f5/f3 is more than or equal to 0.41 and less than or equal to 0.61; and the total effective focal length f of the optical imaging lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens meet the condition that f/f2+ f/f3 is not less than-1.7 and not more than-1.35.

In one embodiment, a center thickness CT5 of the fifth lens on the optical axis, a spacing distance T45 of the fourth lens and the fifth lens on the optical axis, and a spacing distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.19 ≦ CT5/(T45+ T56 ≦ 0.26.

In one embodiment, the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET5 of the fifth lens meet 0.64 ≦ CT4/ET5 ≦ 0.94.

In one embodiment, the fifth lens has a negative optical power.

This application has adopted six lens, through the focal power of rational distribution each lens, face type, the center thickness of each lens and the epaxial interval between each lens etc for above-mentioned optical imaging lens has at least one beneficial effect such as long focal length, miniaturization, high imaging quality.

Drawings

Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;

fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;

fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;

fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;

fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;

fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;

fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;

fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;

fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;

fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;

fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;

fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6;

fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application;

fig. 14A to 14D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 7.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side is called the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens.

It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The features, principles, and other aspects of the present application are described in detail below.

The optical imaging lens according to an exemplary embodiment of the present application may include, for example, six lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in sequence from the object side to the image side along the optical axis, and an air space is formed between every two adjacent lenses.

In an exemplary embodiment, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a negative optical power; the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens can have negative focal power, and the object side surface of the fifth lens is a concave surface; the sixth lens has positive power or negative power, and the object side surface of the sixth lens can be concave.

In an exemplary embodiment, both the object-side surface and the image-side surface of the first lens may be convex.

In an exemplary embodiment, the image side surface of the third lens may be concave.

In an exemplary embodiment, an image side surface of the fifth lens may be convex.

In an exemplary embodiment, an image side surface of the sixth lens may be convex.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression TTL/f < 1, where TTL is a distance on an optical axis from an object-side surface of the first lens element to an imaging surface of the optical imaging lens, and f is an effective focal length of the optical imaging lens. More specifically, TTL and f can further satisfy 0.8 < TTL/f < 1, e.g., 0.90 ≦ TTL/f ≦ 0.91. The condition formula TTL/f is less than 1, which is beneficial to properly shortening the total length of the optical system and enabling the lens to be thinner and lighter.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-3 < f3/f < -1.5, where f3 is an effective focal length of the third lens, and f is an effective focal length of the optical imaging lens. More specifically, f3 and f can further satisfy-2.66. ltoreq. f 3/f. ltoreq.1.74. The effective focal length of the third lens is reasonably selected, so that the long-focus characteristic of the lens can be satisfied while the aberration is corrected.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-7 < f3/f1 < -4, where f3 is an effective focal length of the third lens and f1 is an effective focal length of the first lens. More specifically, f3 and f1 may further satisfy-6.5 < f3/f1 < -4.0, for example-6.31. ltoreq. f3/f 1. ltoreq.4.18. The ratio of the effective focal length of the third lens to the effective focal length of the first lens is reasonably set, thereby being beneficial to realizing the long-focus characteristic of the system, improving the convergence capacity of the optical system to light, adjusting the focusing position of the light and shortening the total length of the system.

In an exemplary embodiment, the image side surface of the second lens may be concave. The curvature radius R4 of the image side surface of the second lens and the effective focal length f2 of the second lens can satisfy-2 < f2/R4 < -1. More specifically, f2 and R4 may further satisfy-1.8 < f2/R4 < -1.4, for example-1.72. ltoreq. f 2/R4. ltoreq.1.48. By properly selecting the ratio between the effective focal length of the second lens and the radius of curvature of the image-side surface of the second lens, it is further ensured that the radius of curvature of the image-side surface of the second lens is positive (i.e. the image-side surface is concave), for example, in the case that the power of the second lens is negative, which effectively balances the astigmatism of the system and further ensures the miniaturization of the optical system.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.5 < f/f5 < -0.5, where f is an overall effective focal length of the optical imaging lens, and f5 is an effective focal length of the fifth lens. More specifically, f and f5 further satisfy-1.38. ltoreq. f/f 5. ltoreq. 0.61. The effective focal length of the fifth lens is reasonably set to ensure that the focal power of the fifth lens is negative, which is beneficial to increasing the focal length of an optical system, realizes the long-focus characteristic of the system, and simultaneously enables the system to have the function of adjusting the light position, thereby better balancing the field curvature.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1 < f1/R1 < 2, where f1 is an effective focal length of the first lens and R1 is a radius of curvature of an object side surface of the first lens. More specifically, f1 and R1 may further satisfy 1.5 < f1/R1 < 1.7, e.g., 1.55. ltoreq. f 1/R1. ltoreq.1.63. The ratio between the effective focal length of the first lens and the radius of curvature of the object-side surface of the first lens is reasonably selected, and further, for example, on the premise that the focal power of the first lens is positive, the radius of curvature of the object-side surface of the first lens is ensured to be positive (that is, the object-side surface is convex), so that the angles of light rays can be effectively adjusted, the astigmatism of the system is balanced, and the telephoto characteristic of the system is realized.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < R8/R2 < 1, where R8 is a radius of curvature of an image-side surface of the fourth lens and R2 is a radius of curvature of an image-side surface of the first lens. More specifically, R8 and R2 may further satisfy 0.2 < R8/R2 < 0.9, e.g., 0.38. ltoreq. R8/R2. ltoreq.0.79. The curvature radius of the image-side surface of the fourth lens element and the curvature radius of the image-side surface of the first lens element are reasonably distributed, and further, for example, when the image-side surface of the fourth lens element is convex, the image-side surface of the first lens element is also convex, so that astigmatism of the system can be effectively balanced, and the miniaturization of the optical system can be further ensured.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 0 < R9/R12 < 1, where R9 is a radius of curvature of an object-side surface of the fifth lens and R12 is a radius of curvature of an image-side surface of the sixth lens. More specifically, R9 and R12 may further satisfy 0.1 < R9/R12 < 0.5, for example 0.16. ltoreq. R9/R12. ltoreq.0.40. The curvature radius of the object-side surface of the fifth lens element and the curvature radius of the image-side surface of the sixth lens element are reasonably distributed, and further, for example, when the object-side surface of the fifth lens element is concave, the image-side surface of the sixth lens element is also convex, so that the distortion of the system can be effectively balanced.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression tan (HFOV) < 0.5, where HFOV is the maximum half field angle of the optical imaging lens. More specifically, HFOV's further may satisfy 0.4 < tan (HFOV) < 0.5, such as 0.43 ≦ tan (HFOV) ≦ 0.45. The maximum half field angle of the optical imaging lens is reasonably controlled, so that the optical system can meet the long-focus characteristic and has better capability of balancing aberration, meanwhile, the deflection angle of the main light ray can be reasonably controlled, the matching degree with a chip is improved, and the structure of the optical system is favorably adjusted.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < CT6/CT4 < 2.5, where CT6 is a central thickness of the sixth lens element on the optical axis, and CT4 is a central thickness of the fourth lens element on the optical axis. More specifically, CT6 and CT4 further satisfy 1.56. ltoreq. CT6/CT 4. ltoreq.2.27. The ratio of the center thicknesses of the sixth lens and the fourth lens on the optical axis is reasonably distributed, so that the size of an optical system can be effectively reduced to avoid the overlarge size of an optical imaging lens, the assembly difficulty of the lens can be reduced, and the higher space utilization rate can be realized.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 2 < ET5/CT5 < 3, where ET5 is an edge thickness of the fifth lens at the maximum effective radius, and CT5 is a center thickness of the fifth lens on the optical axis. More specifically, ET5 and CT5 further satisfy 2.13 ≦ ET5/CT5 ≦ 2.71. The edge thickness of the fifth lens and the central thickness of the fifth lens on the optical axis are reasonably controlled, so that the size of the system can be effectively reduced, and the long-focus characteristic of the system is met; meanwhile, the lens adjusting device can be beneficial to adjusting the structure of the system and reducing the difficulty of lens processing and assembling.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 4 < f12/CT1 < 5, where f12 is a combined focal length of the first lens and the second lens, and CT1 is a center thickness of the first lens on an optical axis. More specifically, f12 and CT1 may further satisfy 4.0 < f12/CT1 < 4.5, e.g., 4.01. ltoreq. f12/CT 1. ltoreq.4.36. The ratio of the combined focal length of the first lens and the second lens to the central thickness of the first lens is reasonably distributed, so that the optical system can meet the long-focus characteristic and has better capability of balancing aberration; meanwhile, the deflection angle of the main light ray can be reasonably controlled, and the structure of the optical system can be favorably adjusted.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression 1.5 < T56/T34 < 2.5, where T56 is a separation distance of the fifth lens and the sixth lens on the optical axis, and T34 is a separation distance of the third lens and the fourth lens on the optical axis. More specifically, T56 and T34 can further satisfy 1.55. ltoreq. T56/T34. ltoreq.2.23. By reasonably controlling the ratio of the spacing distance between the fifth lens and the sixth lens on the optical axis to the spacing distance between the third lens and the fourth lens on the optical axis, enough spacing space can be formed between the lenses, so that the degree of freedom of lens surface change is higher, and the capability of the system for correcting astigmatism and curvature of field is improved.

In an exemplary embodiment, the optical imaging lens of the present application may satisfy the conditional expression-1.8 < R6/R11 < -0.8, where R6 is a radius of curvature of an image-side surface of the third lens and R11 is a radius of curvature of an object-side surface of the sixth lens. More specifically, R6 and R11 may further satisfy-1.69. ltoreq. R6/R11. ltoreq. 0.90. The curvature radii of the image side surface of the third lens and the object side surface of the sixth lens are reasonably distributed, and further, for example, the image side surface of the third lens is ensured to be concave while the object side surface of the sixth lens is ensured to be concave, so that the light deflection angle can be adjusted, and the optical system can be better matched with the chief ray angle of the chip.

In an exemplary embodiment, the optical imaging lens may further include at least one diaphragm to improve the imaging quality of the lens. Alternatively, a diaphragm may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.

The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the machinability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic products such as smart phones. The optical imaging lens with the configuration also has the advantages of long focal length, high imaging quality and the like.

In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.

However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although six lenses are exemplified in the embodiment, the optical imaging lens is not limited to including six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.

Example 1

An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic structural diagram of an optical imaging lens according to embodiment 1 of the present application.

As shown in fig. 1, an optical imaging lens according to an exemplary embodiment of the present application includes, in order from an object side to an image side along an optical axis: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 1, wherein the unit of the radius of curvature and the thickness are both millimeters (mm).

TABLE 1

As can be seen from table 1, the object-side surface and the image-side surface of any one of the first lens element E1 through the sixth lens element E6 are aspheric. In the present embodiment, the profile x of each aspheric lens can be defined using, but not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S12 used in example 1₄、A₆、A₈、A₁₀And A₁₂。

Flour mark	A4	A6	A8	A10	A12
						S1	-7.1400E-03	-5.6300E-03	8.5500E-04	-2.0900E-03	-3.4000E-04
S2	4.4009E-02	-2.4390E-02	4.6520E-03	7.8540E-03	-3.9800E-03
						S3	4.8091E-02	2.4530E-03	-3.8060E-02	5.5701E-02	-2.5820E-02
S4	3.3611E-02	6.9284E-02	-1.6039E-01	2.5321E-01	-1.5056E-01
						S5	9.3483E-02	2.6805E-02	1.4567E-02	5.0120E-02	7.6680E-03
S6	4.3082E-02	2.6508E-02	-9.8690E-02	1.6095E-01	-5.1000E-11
						S7	-1.8306E-01	-1.4385E-01	-1.3446E-01	-5.3200E-02	1.4800E-09
S8	-1.3237E-01	-8.0280E-02	2.0739E-02	-3.4920E-02	4.3565E-02
						S9	5.9025E-02	1.8840E-02	-7.2500E-03	7.2300E-04	-2.1000E-05
S10	4.9976E-02	4.5438E-02	-8.5500E-02	4.0896E-02	-7.1800E-03
						S11	-8.0210E-02	3.7500E-02	-5.9400E-03	2.6800E-04	1.7800E-05
S12	-4.6260E-02	-4.8500E-03	6.5060E-03	-2.0100E-03	2.1400E-04

TABLE 2

Table 3 gives the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL (i.e., the distance on the optical axis from the object-side surface S1 to the imaging surface S15 of the first lens E1), and the maximum half field angle HFOV in embodiment 1.

TABLE 3

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.

Example 2

An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.

As shown in fig. 3, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 2, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 5 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 6 gives the effective focal lengths f1 to f6, the total effective focal length f of the optical imaging lens, the total optical length TTL, and the maximum half field angle HFOV of the respective lenses in embodiment 2.

TABLE 4

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-9.1900E-03

4.5550E-03

-4.2900E-02

1.0885E-01

-1.8016E-01

1.8490E-01

-1.1529E-01

3.9512E-02

-5.6800E-03

S2

4.8469E-02

-6.7460E-02

8.4566E-02

1.3737E-01

-6.6071E-01

1.0128E+00

-8.0084E-01

3.3167E-01

-5.7260E-02

S3

5.3242E-02

-4.7640E-02

-2.8000E-04

6.2066E-01

-1.9816E+00

2.9363E+00

-2.3869E+00

1.0403E+00

-1.9229E-01

S4

2.9198E-02

1.1306E-01

-7.3877E-01

3.5116E+00

-9.3700E+00

1.4816E+01

-1.4024E+01

7.3973E+00

-1.6871E+00

S5

9.2101E-02

-7.4230E-02

9.4100E-01

-4.0718E+00

1.1694E+01

-2.1313E+01

2.3720E+01

-1.4623E+01

3.8514E+00

S6

4.4875E-02

-1.5691E-01

1.4580E+00

-7.6674E+00

2.5977E+01

-5.5209E+01

7.1191E+01

-5.0833E+01

1.5510E+01

S7

-1.6322E-01

-4.1522E-01

1.8788E+00

-8.9533E+00

2.6315E+01

-5.0536E+01

6.0769E+01

-4.2190E+01

1.3002E+01

S8

-1.1062E-01

-3.2477E-01

1.3244E+00

-4.5917E+00

1.0255E+01

-1.4096E+01

1.1601E+01

-5.2997E+00

1.0527E+00

S9

5.7390E-02

-1.3901E-01

7.0088E-01

-2.2748E+00

4.7617E+00

-5.9745E+00

4.3081E+00

-1.6439E+00

2.5712E-01

S10

5.2428E-02

3.3294E-02

-6.5760E-02

4.9124E-02

-4.9590E-02

4.3830E-02

-2.2290E-02

5.7950E-03

-6.1000E-04

S11

-7.8480E-02

3.5531E-02

-5.2000E-03

-9.7000E-06

1.6600E-04

-5.7000E-05

1.2300E-05

-1.5000E-06

7.5200E-08

S12

-4.7070E-02

-3.4900E-03

5.9180E-03

-1.7600E-03

1.0200E-04

4.7600E-05

-1.4000E-05

2.0900E-06

-1.2000E-07

TABLE 5

f1(mm)	2.51	f6(mm)	-13.00
				f2(mm)	-5.41	f(mm)	5.99
f3(mm)	-13.27	TTL(mm)	5.41
				f4(mm)	10.86	HFOV(°)	24.2
f5(mm)	-5.80

TABLE 6

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.

Example 3

An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.

As shown in fig. 5, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has negative power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 3, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 9 gives the effective focal lengths f1 to f6, the total effective focal length f of the optical imaging lens, the total optical length TTL, and the maximum half field angle HFOV of the respective lenses in embodiment 3.

TABLE 7

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.8900E-03

-9.3900E-03

2.2714E-02

-8.0740E-02

1.5731E-01

-1.8540E-01

1.2786E-01

-4.8050E-02

7.6880E-03

S2

4.0850E-02

-5.2260E-02

2.2297E-01

-5.5308E-01

7.5609E-01

-6.2332E-01

3.2248E-01

-1.0028E-01

1.4875E-02

S3

4.0257E-02

-1.8600E-03

1.6968E-01

-4.5423E-01

4.2654E-01

-3.5810E-02

-2.0727E-01

1.3563E-01

-2.6930E-02

S4

1.7871E-02

1.2372E-01

-3.9922E-01

1.6645E+00

-4.6298E+00

7.5827E+00

-7.1526E+00

3.5979E+00

-7.5197E-01

S5

8.0248E-02

-2.4080E-02

1.0651E+00

-5.0884E+00

1.4299E+01

-2.4911E+01

2.6657E+01

-1.5982E+01

4.1252E+00

S6

2.6427E-02

-1.2950E-02

4.3982E-01

-1.5877E+00

2.8924E+00

-2.4251E+00

2.0637E-02

1.5711E+00

-8.1328E-01

S7

-1.9911E-01

-3.3891E-01

1.4257E+00

-5.9431E+00

1.4200E+01

-2.1758E+01

1.9862E+01

-9.9666E+00

2.2340E+00

S8

-1.6327E-01

-6.6520E-02

-3.3278E-01

1.1004E+00

-4.0662E-01

-2.1895E+00

3.5682E+00

-2.2026E+00

5.0635E-01

S9

1.0836E-02

-7.8120E-02

-6.1719E-01

3.0383E+00

-5.0823E+00

4.0846E+00

-1.4796E+00

7.7786E-02

5.8527E-02

S10

5.7407E-02

-1.3480E-01

4.1236E-01

-6.0217E-01

5.0046E-01

-2.5642E-01

8.0323E-02

-1.4100E-02

1.0600E-03

S11

-6.1730E-02

3.5997E-02

-2.4080E-02

1.0972E-02

-3.0700E-03

8.4200E-04

-2.4000E-04

3.9800E-05

-2.7000E-06

S12

-9.8690E-02

5.4252E-02

-3.3050E-02

1.4718E-02

-4.6900E-03

9.5100E-04

-1.0000E-04

2.4800E-06

2.9300E-07

TABLE 8

TABLE 9

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.

Example 4

An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.

As shown in fig. 7, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has positive power, and has a concave object-side surface S11 and a convex image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 4, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 11 shows high-order term coefficients that can be used for each aspherical mirror surface in embodiment 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in embodiment 1 above. Table 12 gives the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL, and the maximum half field angle HFOV in embodiment 4.

Watch 10

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-8.2600E-03

-7.2300E-03

1.8650E-02

-7.1540E-02

1.3834E-01

-1.5986E-01

1.0853E-01

-4.0270E-02

6.3580E-03

S2

3.8506E-02

-1.9760E-02

4.2270E-02

-1.0074E-01

1.5118E-01

-1.4841E-01

9.8168E-02

-3.9660E-02

7.4400E-03

S3

3.8733E-02

2.4105E-02

-1.8250E-02

4.6095E-02

-1.8342E-01

3.1543E-01

-2.7580E-01

1.2181E-01

-2.1390E-02

S4

2.1464E-02

7.1804E-02

-1.2249E-01

5.5432E-01

-1.5938E+00

2.6295E+00

-2.4974E+00

1.2361E+00

-2.4367E-01

S5

7.0721E-02

4.1158E-02

5.0016E-01

-2.5150E+00

7.4701E+00

-1.3451E+01

1.4596E+01

-8.7722E+00

2.2617E+00

S6

6.3050E-03

9.4084E-02

-3.5465E-01

1.9084E+00

-6.4284E+00

1.3364E+01

-1.6528E+01

1.1211E+01

-3.1960E+00

S7

-2.0482E-01

-2.4814E-01

9.4713E-01

-5.3329E+00

1.6104E+01

-2.9998E+01

3.3258E+01

-2.0584E+01

5.5986E+00

S8

-1.4742E-01

-9.1590E-02

4.8681E-01

-1.8368E+00

4.3864E+00

-6.6431E+00

6.0187E+00

-2.9582E+00

6.1108E-01

S9

-7.6300E-03

5.4016E-02

2.0964E-01

-7.4217E-01

1.4996E+00

-2.2486E+00

2.1350E+00

-1.0883E+00

2.2507E-01

S10

2.9443E-02

3.0790E-03

3.3628E-02

-1.1276E-01

1.2086E-01

-6.8210E-02

2.1891E-02

-3.7800E-03

2.7300E-04

S11

-4.4870E-02

1.6698E-02

-4.2400E-03

1.8390E-03

-5.7000E-04

7.3600E-05

1.0600E-06

-1.1000E-06

7.1700E-08

S12

-4.2040E-02

-4.7600E-03

4.1460E-03

-1.2900E-03

5.3200E-05

7.9100E-05

-2.6000E-05

3.8800E-06

-2.2000E-07

TABLE 11

f1(mm)	2.51	f6(mm)	500.98
				f2(mm)	-5.43	f(mm)	6.17
f3(mm)	-10.92	TTL(mm)	5.61
				f4(mm)	9.55	HFOV(°)	23.3
f5(mm)	-4.47

TABLE 12

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.

Example 5

An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.

As shown in fig. 9, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 5, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 14 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 15 gives the effective focal lengths f1 to f6, the total effective focal length f of the optical imaging lens, the total optical length TTL, and the maximum half field angle HFOV of each lens in embodiment 5.

Watch 13

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.7900E-03

-9.2200E-03

2.7569E-02

-9.2550E-02

1.6847E-01

-1.8610E-01

1.2211E-01

-4.4100E-02

6.8030E-03

S2

3.7613E-02

-1.4360E-02

2.9491E-02

-8.0990E-02

1.3471E-01

-1.4459E-01

1.0114E-01

-4.1390E-02

7.5540E-03

S3

3.6654E-02

3.2157E-02

-1.3240E-02

-2.6300E-02

6.0580E-03

4.8199E-02

-5.7580E-02

2.5704E-02

-3.8800E-03

S4

1.8967E-02

8.3387E-02

-1.1918E-01

4.6046E-01

-1.2867E+00

2.0701E+00

-1.9084E+00

9.1887E-01

-1.7786E-01

S5

5.9561E-02

7.8644E-02

4.3328E-01

-2.3422E+00

6.8071E+00

-1.1902E+01

1.2558E+01

-7.3445E+00

1.8419E+00

S6

-2.0000E-03

1.5041E-01

-4.4877E-01

1.9505E+00

-6.0121E+00

1.1770E+01

-1.3872E+01

9.0426E+00

-2.4903E+00

S7

-1.9994E-01

-2.6881E-01

1.1538E+00

-5.6951E+00

1.6105E+01

-2.8490E+01

3.0071E+01

-1.7769E+01

4.6399E+00

S8

-1.2711E-01

-2.4530E-01

8.1901E-01

-2.1894E+00

5.1341E+00

-8.7158E+00

8.8454E+00

-4.7476E+00

1.0457E+00

S9

3.2570E-02

-1.9713E-01

6.4248E-01

-7.3839E-01

7.3161E-01

-1.6678E+00

2.4144E+00

-1.5550E+00

3.6669E-01

S10

4.8358E-02

-5.4420E-02

2.1369E-01

-4.1180E-01

4.0612E-01

-2.3129E-01

7.7085E-02

-1.3980E-02

1.0650E-03

S11

-6.8300E-02

2.4627E-02

-1.6300E-03

-1.3100E-03

8.6000E-04

-3.2000E-04

6.6000E-05

-7.0000E-06

3.0200E-07

S12

-6.3220E-02

6.7180E-03

7.0800E-04

-1.7000E-04

-5.5000E-04

3.5400E-04

-1.0000E-04

1.4100E-05

-7.9000E-07

TABLE 14

f1(mm)	2.48	f6(mm)	-15.01
				f2(mm)	-5.30	f(mm)	5.99
f3(mm)	-10.54	TTL(mm)	5.41
				f4(mm)	9.45	HFOV(°)	24.0
f5(mm)	-5.50

Watch 15

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.

Example 6

An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.

As shown in fig. 11, an optical imaging lens according to an exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 6, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 17 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 18 gives the effective focal lengths f1 to f6 of the respective lenses, the total effective focal length f of the optical imaging lens, the total optical length TTL, and the maximum half field angle HFOV in embodiment 6.

TABLE 16

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.7000E-03

-9.5800E-03

2.8678E-02

-9.5760E-02

1.7397E-01

-1.9212E-01

1.2608E-01

-4.5560E-02

7.0360E-03

S2

4.0455E-02

-3.6060E-02

1.0279E-01

-2.3377E-01

3.3994E-01

-3.2300E-01

1.9861E-01

-7.1920E-02

1.1763E-02

S3

4.0155E-02

-1.5200E-03

9.7545E-02

-2.5378E-01

3.1457E-01

-2.2352E-01

9.1350E-02

-2.0130E-02

2.0860E-03

S4

2.1174E-02

5.9349E-02

-5.0750E-02

3.1394E-01

-1.0549E+00

1.8166E+00

-1.7202E+00

8.3235E-01

-1.6061E-01

S5

7.1150E-02

4.9807E-02

4.7940E-01

-2.4123E+00

6.9462E+00

-1.2143E+01

1.2838E+01

-7.5256E+00

1.8915E+00

S6

5.6880E-03

1.2453E-01

-4.2552E-01

2.0016E+00

-6.2790E+00

1.2319E+01

-1.4485E+01

9.4024E+00

-2.5714E+00

S7

-1.9832E-01

-2.6411E-01

1.0513E+00

-5.1220E+00

1.4210E+01

-2.4484E+01

2.4832E+01

-1.3940E+01

3.4444E+00

S8

-1.2047E-01

-2.5243E-01

6.7951E-01

-1.4647E+00

3.4407E+00

-6.4162E+00

6.9511E+00

-3.8626E+00

8.6453E-01

S9

4.4408E-02

-2.3052E-01

5.9168E-01

-2.3376E-01

-4.8646E-01

-1.5660E-01

1.3423E+00

-1.1370E+00

2.9682E-01

S10

5.4511E-02

-7.7280E-02

2.7472E-01

-5.0208E-01

4.8414E-01

-2.7238E-01

9.0173E-02

-1.6310E-02

1.2420E-03

S11

-6.9510E-02

2.5740E-02

-1.7800E-03

-1.3500E-03

8.7000E-04

-3.2000E-04

6.5200E-05

-7.0000E-06

3.0000E-07

S12

-5.9610E-02

5.3160E-03

1.4210E-03

-3.7000E-04

-5.3000E-04

3.5800E-04

-1.0000E-04

1.4400E-05

-8.1000E-07

TABLE 17

f1(mm)	2.49	f6(mm)	-14.53
				f2(mm)	-5.35	f(mm)	5.99
f3(mm)	-10.80	TTL(mm)	5.41
				f4(mm)	9.64	HFOV(°)	24.0
f5(mm)	-5.59

Watch 18

Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.

Example 7

An optical imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic structural view showing an optical imaging lens according to embodiment 7 of the present application.

As shown in fig. 13, the optical imaging lens according to the exemplary embodiment of the present application, in order from an object side to an image side along an optical axis, includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.

The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a concave object-side surface S11 and a convex image-side surface S12. Filter E7 has an object side S13 and an image side S14. The light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.

Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example 7, wherein the unit of the radius of curvature and the thickness are both millimeters (mm). Table 20 shows high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above. Table 21 gives effective focal lengths f1 to f6 of the respective lenses, a total effective focal length f of the optical imaging lens, an optical total length TTL, and a maximum half field angle HFOV in embodiment 7.

Watch 19

Flour mark

A4

A6

A8

A10

A12

A14

A16

A18

A20

S1

-7.6800E-03

-9.8900E-03

2.9621E-02

-9.9080E-02

1.8096E-01

-2.0051E-01

1.3209E-01

-4.7910E-02

7.4230E-03

S2

3.8499E-02

-2.8790E-02

8.2788E-02

-1.7719E-01

2.3175E-01

-1.9922E-01

1.1545E-01

-4.1450E-02

7.0580E-03

S3

3.7339E-02

1.2174E-02

6.4553E-02

-1.5710E-01

1.0184E-01

5.1506E-02

-1.1692E-01

6.6856E-02

-1.3400E-02

S4

1.9274E-02

7.4200E-02

-9.4040E-02

4.6794E-01

-1.4671E+00

2.4798E+00

-2.3880E+00

1.2205E+00

-2.5692E-01

S5

5.6174E-02

9.6560E-02

3.8259E-01

-2.1246E+00

6.1582E+00

-1.0740E+01

1.1292E+01

-6.5705E+00

1.6387E+00

S6

-1.3590E-02

1.7114E-01

-4.4088E-01

1.8177E+00

-5.4216E+00

1.0318E+01

-1.1865E+01

7.5596E+00

-2.0315E+00

S7

-2.0709E-01

-2.6925E-01

9.2728E-01

-4.1921E+00

1.0678E+01

-1.6849E+01

1.5528E+01

-8.0255E+00

1.9367E+00

S8

-1.3564E-01

-2.9697E-01

1.0032E+00

-3.1505E+00

7.7141E+00

-1.2495E+01

1.1976E+01

-6.1355E+00

1.3046E+00

S9

4.3101E-02

-1.6864E-01

6.8288E-01

-1.5895E+00

3.4512E+00

-5.9464E+00

6.1531E+00

-3.2934E+00

7.0283E-01

S10

5.0265E-02

-2.2460E-02

1.6186E-01

-3.8467E-01

4.0989E-01

-2.4285E-01

8.2984E-02

-1.5330E-02

1.1860E-03

S11

-7.4760E-02

2.8899E-02

-2.7200E-03

-9.0000E-04

6.1900E-04

-2.3000E-04

4.9100E-05

-5.3000E-06

2.2500E-07

S12

-5.9750E-02

3.4220E-03

2.3230E-03

-6.4000E-04

-3.9000E-04

2.9000E-04

-8.6000E-05

1.3100E-05

-8.0000E-07

Watch 20

f1(mm)	2.50	f6(mm)	-18.15
				f2(mm)	-5.37	f(mm)	5.99
f3(mm)	-10.44	TTL(mm)	5.41
				f4(mm)	9.17	HFOV(°)	24.0
f5(mm)	-5.23

TABLE 21

Fig. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 7, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the optical imaging lens of embodiment 7, which represents distortion magnitude values corresponding to different image heights. Fig. 14D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the optical imaging lens according to embodiment 7 can achieve good imaging quality.

In summary, examples 1 to 7 each satisfy the relationship shown in table 22.

Conditional expression (A) example	1	2	3	4	5	6	7
								TTL/f	0.90	0.90	0.90	0.91	0.90	0.90	0.90
f3/f	-2.06	-2.21	-2.66	-1.77	-1.76	-1.80	-1.74
								f3/f1	-4.91	-5.29	-6.31	-4.35	-4.25	-4.34	-4.18
f2/R4	-1.54	-1.56	-1.48	-1.72	-1.49	-1.63	-1.59
								f/f5	-1.00	-1.03	-0.61	-1.38	-1.09	-1.07	-1.15
f1/R1	1.63	1.61	1.60	1.58	1.55	1.56	1.56
								R8/R2	0.38	0.48	0.63	0.46	0.55	0.53	0.79
R9/R12	0.31	0.29	0.16	0.40	0.18	0.21	0.20
								tan(HFOV)	0.45	0.45	0.44	0.43	0.44	0.44	0.44
CT6/CT4	2.27	2.09	1.56	2.04	1.76	1.73	2.03
								ET5/CT5	2.13	2.60	2.71	2.44	2.52	2.43	2.64
f12/CT1	4.01	4.08	4.21	4.20	4.29	4.27	4.36
								T56/T34	2.23	2.11	1.81	1.55	1.70	1.74	1.67
R6/R11	-1.11	-1.22	-1.69	-0.90	-1.02	-1.30	-0.95
								CT2/CT3	0.93	0.93	0.95	1.01	1.07	1.06	1.04
\|(R9-R10)/(R9+R10)\|	0.53	0.56	0.36	0.90	0.62	0.61	0.67
								CT6/CT1	0.81	0.82	0.92	0.94	0.76	0.76	0.81
(CT4+CT5)/CT1	0.60	0.61	0.82	0.72	0.68	0.68	0.64
								CT6/(CT2+CT3+CT4)	0.94	0.90	0.79	0.94	0.80	0.79	0.88
ΣCT/TTL	0.51	0.50	0.53	0.51	0.48	0.48	0.48
								R1/f	0.26	0.26	0.26	0.26	0.27	0.27	0.27
R11/R12	0.44	0.46	0.21	0.97	0.38	0.41	0.45
								CT5/(T45+T56)	0.21	0.19	0.20	0.26	0.21	0.21	0.21
CT4/ET5	0.68	0.70	0.94	0.72	0.71	0.74	0.64
								f5/f3	0.49	0.44	0.61	0.41	0.52	0.52	0.50
f/f2+f/f3	-1.59	-1.56	-1.35	-1.70	-1.70	-1.68	-1.69
								(T12+T23)/T34	0.93	0.81	0.93	0.97	0.99	1.01	1.05
CT4/T34	0.79	0.79	1.03	0.77	0.71	0.73	0.67
								f1/f5	-0.42	-0.43	-0.26	-0.56	-0.45	-0.45	-0.48
f/(R6-R8)	0.82	0.68	0.51	0.71	0.67	0.61	0.55
								R11/f5	0.53	0.62	0.37	1.24	0.90	0.81	0.99
R4/R6	0.99	0.79	0.68	0.63	0.71	0.56	0.69
								\|R1/R11\|	0.48	0.43	0.44	0.29	0.32	0.35	0.31

TABLE 22

The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,

the first lens has positive focal power, and the object side surface of the first lens is a convex surface;

the second lens has negative focal power, and the image side surface of the second lens is a concave surface;

the third lens has negative focal power, and the image side surface of the third lens is a concave surface;

the fourth lens has positive focal power or negative focal power, and the image side surface of the fourth lens is a convex surface;

the fifth lens has a negative optical power;

the sixth lens has positive optical power or negative optical power;

a center thickness CT5 of the fifth lens on the optical axis, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a separation distance T56 of the fifth lens and the sixth lens on the optical axis satisfy 0.19 ≦ CT5/(T45+ T56) ≦ 0.26;

the central thickness CT4 of the fourth lens on the optical axis and the edge thickness ET5 of the fifth lens meet the condition that CT4/ET5 is more than or equal to 0.64 and less than or equal to 0.94; and

the effective focal length f5 of the fifth lens and the effective focal length f3 of the third lens meet f5/f3 of 0.41-0.61.

2. The optical imaging lens according to claim 1, characterized in that a separation distance T12 on the optical axis of the first lens and the second lens, a separation distance T23 on the optical axis of the second lens and the third lens, and a separation distance T34 on the optical axis of the third lens and the fourth lens satisfy 0.81 ≦ (T12+ T23)/T34 ≦ 1.05.

3. The optical imaging lens of claim 1, wherein a center thickness CT4 of the fourth lens on the optical axis and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 0.67 ≦ CT4/T34 ≦ 1.03.

4. The optical imaging lens of claim 1, wherein the first lens has positive optical power and the image side surface is convex.

5. The optical imaging lens of claim 1, wherein the second lens has a negative optical power and the object side surface is convex.

6. The optical imaging lens of claim 1, wherein the third lens has a negative power and a convex object-side surface.

7. The optical imaging lens of claim 1, wherein the fourth lens has a positive optical power and a concave object-side surface.

8. The optical imaging lens of claim 1, wherein the fifth lens has a negative optical power.

9. The optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis satisfy TTL/f < 1.

10. The optical imaging lens according to any one of claims 1 to 9, characterized in that an effective focal length f1 of the first lens and an effective focal length f5 of the fifth lens satisfy-0.56 ≦ f1/f5 ≦ -0.26.

11. The optical imaging lens according to any one of claims 1 to 9, characterized in that a total effective focal length f of the optical imaging lens, a radius of curvature R6 of an image-side surface of the third lens, and a radius of curvature R8 of an image-side surface of the fourth lens satisfy 0.51 ≦ f/(R6-R8 ≦ 0.82.

12. The optical imaging lens according to any one of claims 1 to 9, characterized in that an effective focal length f5 of the fifth lens and a radius of curvature R11 of an object side surface of the sixth lens satisfy 0.37 ≦ R11/f5 ≦ 1.24.

13. The optical imaging lens according to any one of claims 1 to 9, wherein a radius of curvature R4 of an image-side surface of the second lens and a radius of curvature R6 of an image-side surface of the third lens satisfy 0.56 ≦ R4/R6 ≦ 0.99.

14. The optical imaging lens according to any one of claims 1 to 9, characterized in that a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R11 of an object-side surface of the sixth lens satisfy 0.29 ≦ R1/R11| ≦ 0.48.

15. The optical imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,

the fifth lens has a negative optical power;

the sixth lens has positive optical power or negative optical power;

the effective focal length f5 of the fifth lens and the effective focal length f3 of the third lens meet f5/f3 of 0.41-0.61; and

the total effective focal length f of the optical imaging lens, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens meet the conditions that f/f2 and f/f3 are more than or equal to-1.7 and more than or equal to-1.35.

16. The optical imaging lens of claim 15, wherein a separation distance T12 on the optical axis of the first lens and the second lens, a separation distance T23 on the optical axis of the second lens and the third lens, and a separation distance T34 on the optical axis of the third lens and the fourth lens satisfy 0.81 ≦ (T12+ T23)/T34 ≦ 1.05.

17. The optical imaging lens of claim 15, wherein a center thickness CT4 of the fourth lens on the optical axis and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 0.67 ≦ CT4/T34 ≦ 1.03.

18. The optical imaging lens of claim 15, wherein the first lens has positive optical power and the image side surface is convex.

19. The optical imaging lens of claim 15, wherein the second lens has a negative power and a convex object-side surface.

20. The optical imaging lens of claim 15, wherein the third lens has a negative power and a convex object-side surface.

21. The optical imaging lens of claim 15, wherein the fourth lens has a positive optical power and a concave object-side surface.

22. The optical imaging lens of claim 15, wherein the fifth lens has a negative optical power.

23. The optical imaging lens of claim 15, wherein a total effective focal length f of the optical imaging lens and a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis satisfy TTL/f < 1.

24. The optical imaging lens according to any one of claims 15 to 23, characterized in that an effective focal length f1 of the first lens and an effective focal length f5 of the fifth lens satisfy-0.56 ≦ f1/f5 ≦ -0.26.

25. The optical imaging lens of any one of claims 15 to 23, wherein the total effective focal length f of the optical imaging lens, the radius of curvature of the image-side surface of the third lens R6, and the radius of curvature of the image-side surface of the fourth lens R8 satisfy 0.51 ≦ f/(R6-R8 ≦ 0.82.

26. The optical imaging lens according to any one of claims 15 to 23, characterized in that an effective focal length f5 of the fifth lens and a radius of curvature R11 of an object side surface of the sixth lens satisfy 0.37 ≦ R11/f5 ≦ 1.24.

27. The optical imaging lens according to any one of claims 15 to 23, wherein a radius of curvature R4 of an image-side surface of the second lens and a radius of curvature R6 of an image-side surface of the third lens satisfy 0.56 ≦ R4/R6 ≦ 0.99.

28. The optical imaging lens of any one of claims 15 to 23, wherein a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R11 of an object-side surface of the sixth lens satisfy 0.29 ≦ R1/R11| ≦ 0.48.